Improvement in joiners  floor-clamps



UNITED STATES PATENT QFEICEc VILIJIAM V. INGRUM, OF BATESVILLE, ARKANSAS.

IMPROVEMENT IN JOINERS FLOOR-CLAMPS.

Specification forming part of Letters Patent No. 146,828, dated January 27, ISH; application led November 22, 1ST 3.

To all whom fit may concern;

Be it known that I, WTLLIAM W. INGRUM, of Batesville, in the county of Independence and State of Arkansas, have invented a new and useful Improvement in Joiners Floor Clamp, of which the following is a speeiiication:

The invention will first be fully described, and then pointed out in the claim.

In the accompanying drawing, Figure l shows the cla-mp applied as when laying a iioor. Fig. 2 is a side View, showing the con-A struction of the machine.

Similar let-ters of reference indicate corresponding parts.

A and B represent the jaws of the clamp; C and D, the handles or shanks thereof. These parts are put together with a pivot, E, on which they open and close, the same as a pair of tongs. F is a double ratehetbar, which is pivoted at one end to the shank l) in a' mortise. The ratchet part of the bar passes through a mortise in the other sha-nk, and the teeth catch on the ends of the mortise, as seen in Fig. 2, to keep the jaws closed when they are attached to the timber of the iioor or ceiling. The ratchet is made double, so that the cla-mp may be used overhead. The ratchet drops by its own gravity and engages automatically. G G are screw-points through the ends of the jaw. These screws are turned by means of a small pin or lever, and the points enter the sides of the timber and prevent the jaws from slipping. His a metallic bar, which is loosely pivoted to the jaw IB. It is attached -to a piece of wood, I, which is placed against the piece of iiooring or ceiling which is to be forced up to its place. This bar is rounded on its inner side, and will roll or roel; on the jaw and maintain a position parallel with the floor, as seen in Fig. l. J is a drag-bar, which is pivoted to one of the Shanks, as seen at K. The lower end drags on the timber, and it acts as a pawl to hold the clamp in position. As seen in Fig. l, the clamp (as a whole) is a lever, the points G G being the i'ulerums, the purchase ot' which lever is the distance between the fulcrums and the center of the metallic bar lrI.

This machine is applicable to manypurposes, but is more particularly designed to facilitate the laying of floors, ,ceiling overhead, or on walls, and in similar places.

Having thus described my invention, I'claim as new and desire to secure by Letters Iatent- The combination of pieces A I) and B C, piv'- oted at E, the pawl J, the pivot-screws Gr (l,

and the bar H, having the grooved end pieces I, with a ratchet, F, pivoted to t-he arm I), and passing through a inortisc in lever C, as and for the purpose specified. x

WILLIAM W. INGRUM.

Witnesses: l

E. R. MCGUIRE, JOHN I. GLENDENIN. 

